Abstract: The article presents the results of a study of the relationship between burnout criteria and adaptation of medical personnel. Despite the huge amount of research on the phenomenon of burnout, there remains a serious problem associated with the duration of work leading to burnout. The purpose of this study is to investigate the relationship between burnout and adaptation of medical personnel with different work experience. The authors used questionnaires "Diagnosis of the level of emotional burnout" (Boyko), "Methods for diagnosing professional burnout" (Maslach and Jackson, adaptation by Vodopyanova), "Methods for diagnosing socio-psychological adaptation" (Rogers and Diamond) for the evaluation the relationship between burnout and adaptation criteria. In addition, the hypothesis was tested that the relationship between burnout and adaptability will vary depending on the duration of professional work of doctors. The analysis of the obtained data was carried out using the IBM Statistics SPSS program. The Spearman criterion, the Kraskel-Wallace criterion, and the Mann-Whitney criterion were used. A correlation analysis of the criteria of burnout and adaptation in groups with different professional experience has shown a high relationship between them. The numerous correlations between burnout and adaptation parameters suggest that these phenomena are two sides of a single process. The number of correlations between the results of the techniques is so high that it makes it difficult to differentiate them. The question arises about the expediency of using two terms to describe virtually the same phenomenon. The authors believe that the existence of two terms is justified only if their relationship to the duration of work is taken into account. In accordance with this, the authors conclude that it is necessary to develop recommendations for the development of adaptation or for the prevention of burnout, depending on the length of service.